Tiffen 6785B 67mm 85B Filter

Using tungsten film in daylight will Produce a bluish cast. The 85 Series will Produce natural colors when shooting with tungsten film outdoors. Sunlight, daylight, incandescent, fluorescent, and other artificial light sources all have color characteristics that vary significantly. Filters give you better images by adjusting for these light variations. Film and video are rated for a particular color temperature such as that of daylight or tungsten light. Filters are used to correct differences in color temperature between the recording medium and the light source.
Warming Color Conversion Filter
5500 to 3200K Color Temp Decrease
ColorCore Technology